Warp stop-motion for looms.



HO MODEL.

v PATBNTED JUNB14, 1904.` 'H. WYMAN.

WAR? STOP MoTIoN PoR Looms. PPLIOTION PULBD MAB. 26. 1904.

PATENT Patented June 14, 1904.

erica.

HORACE WYMAN, OF WORCESTER MASSACHUSETTS, ASSIGNOR TO CROMPTON & lKNOWLES LOOM. WORKS, OF WORCESTER, MASSA- OHUSEITS, A CORPORATION MASSACHUSETTS.

W-ARP STOPfNiGTiQN FR LOQNES SPECIFICATION forming part Of Letters Patent No. 762,569,' dated J une 14, 1904.

l Application filed March 26, 1904. Serial No. 200,087. (No model.)

To all when/z,` it may concern:

' Be it known that I, HORACE WYMAN, a citizen of the' United States, residing at Vforcester, inthe county of Worcester and State of Massachusetts, have invented certain new and useful Improvements in- Warp Stop-Motions for Looms, of which the following is a specilication. y

My invention relates to vwarp stop-motions, and particularly to that class of warp stopmotion in 'which two warp-supporting rods are used to divide the warps into two planes and two'sets of drop-bars are used, which are end of the drop-bar will engage a terminal to.

ends, through which extend supported on the warp-threads,'and preferably I 5.

have elongated open end slots at their lower terminals or guide-bars.

" 'Inthe case of an electric warp stop-motion on the breaking of a warp-thread and the dropping of the drop-bar thereon the lower close the circuit and through mechanism of any ordinary construction stop the loom.

In the case of a mechanical warp stop-motion the dropping of adrop-bar will bring the lower end thereof in the path of ar reciprocating blade to stop the same and through intermediate me'chanism'stop the loom in the wellknown way.

f lt is found in practice in the class of warp stop-motions above referred to in the operation of the loom that the drop-bars supported on the warp-threads are apt to jump up andv be disconnected from the warp-threads, and different devices have been employed to prevent the drop-bars from jumping'up from the warp-threads. Some of these devices are per- -inanently attached to some part of the warp I'stop-rnetion and others, which are of fiexibie yor elastic material, are made detachable.

lt is especially desirable to have the device v` which extends over the drop-bars te prevent their jumping up on-the warp-threads of'rigid ir non-iiexible material, 'so that there wiii be no'sagging or yieding oi the device; it is aise especially desirable to have said device readily and quickly detachable from 'the warp stop-motion, so that the attendant can quickly remove the same to obtain ready access tothe drop-bars and the warp-threads below ,the device.

The 4object of my invention is to provide a rigid or non-iiexible device to extend above the drop-bars and prevent them from jumping ed of the warp-threads, which dcviceis detachable and may be readily detached and removed without removing screwsor any attaching devices.

-in my improvements I preferably provide at each end of the warp stop-motion above the warp-supporting rods a stand having a recess therein to receive the ends of the rigid or non-iiexible strip or bar which extends directly over the drop-bars and also to provide means made separate from and not connected with said strip or bar to hold the same in said recesses. n

i have onlyshown in the drawings sufiicient portions of a warp stop-motion embodying my improvements to enable those skilled in the art to which my invention belongs to make and use the same.

Referring to the drawings, Figure 1 is a plan view of parts of Aan electric warp stopmotion with my improvements applied therete. At the right of said figure the retainingbar and the supporting-stand therefor is not shown. Fig. 2 is a side view of the parts shown in Fig. l looking in the direction of arrow'c, same figure. Fig. 3 is a section on line 3 3., Fig. 2., looking in the direction of arrow t, same figure. Fig. 4 is a detached View of the stand which holds one end of the retaining-bar. iiig. 5 corresponds te Fig. e, but shows a sectional view of the holder and the bar held therein; and Fig. j6 is a plan view of one end of the. retaining-bar detached.

the accompanying drawings., l represents the brackets or supports for the end 2 of tue stop-motion. 3 represents the warp-supporting rods, supported at their ends,

by the iee 3, as shown in bined inl this instance with the parts of the4 electric warp stop-motionabove described.

A stand 9, preferably of the shape shown,

is permanently secured at each end of the warp stop-motion. The vertical portion 9 of `the stand 9 in this instance has an elongated slot 9 therein, by means of which it may be adjustablyattached to the end of the warpstop-motion frame. The horizontal portion 9 of the stand9 extends over the upper part of the warp stop-motion at each end in ahorizontal plane, as shown in Fig. 2. Said part .9" 1s recessed orgrooved to form a horizontal recess or opening 9", preferably closed at one end and open at the .otheri The open end preferably has a flaring mouth or opening 9, as shown in Fig. 4. Extending up from the horizontal portion 9 is an arm 9, `to the upper end of which is in this instance attached by a -rivet l() one end of a leaf-spring l0. The free end of the leaf-spring 10 is preferably bent, as shown, to form the angular portion 10", which is adapted to extend into an angular recess ll in the upper side of the rigid strip or bar ll at the end thereof. The bar 11 is preferably made of woodand is of sufiicient length to extend across'the warp stopmotion on the upper part thereof just above the drop-bars 5. Each end of the bar ll is preferably supported and detachably held in position over the drop-bars 5 by the stand 9,

having the recess or opening9b therein to receive the end of the bar 11 and the holdingspring l0 or its equivalent to detachably hold the bar in said track or way 9b.

By means of the angular or downward pro-A jection 10 in the spring 10. and the rcc'essll in the end of the bar 1l the bar is locked or held in operative position and is moved out of operative position and detached by simply drawing it out of the waysv 9b in the stand 9,

the springs 10 yielding to release the 'ends of the bar-11. The advantages of my improvements will be readily appreciated by those skilled in the art.

They are of very simple construction and may be readily applied with very little expense to any warp stop-motion of any ordinary construction, either electrical or mechanical. The rigidity or non-flexibility of the bar 11 prevents any sagging of said bar intermediate its ends.

It will be understood that the details ofl construction of my improvements may be varied, if desired.

Having thus described my invention, what ends of the warp stop-motion, Said bracltsv having recesses therein to receive the ends of a bar or strip extending over the droirbars, of said bar or strip adapted to be supported in saidrecesses, and means for holding it in said recesses, substantially as shown and described.

3. In a warp stop-motion of a loom, the

combination with brackets or stands adapted4 to be secured tothe ends of the warp stopniotion, and having recesses therein to receive the ends of a strip or bar, and a spring sef cured to said brackets, of a strip or bar adapted to be supported at its vends in said recesses and be held therein by said spring, substantially as shown and described.

4f. In a warp stop-motion of a loom, the combination with brackets or stands adapted to be secured to the ends of the warp stopmotion, and having recesses therein to receive the ends of a strip or bar,A of a strip or bar having recesses at its ends and adapted to be held thereby, substantially as shown and described.

HORACE WYMAN. Witnesses J. C. DEWEY, I

M. HAAs. 

